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Segment Reporting - Consolidated Revenues by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue from External Customer [Line Items]
Sales	$ 10,037	$ 9,434
United States
Revenue from External Customer [Line Items]
Sales	4,133	4,195
Europe, Middle East, Africa
Revenue from External Customer [Line Items]
Sales	3,191	2,629
Asia Pacific
Revenue from External Customer [Line Items]
Sales	1,238	1,001
Japan
Revenue from External Customer [Line Items]
Sales	737	705
Latin America
Revenue from External Customer [Line Items]
Sales	532	485
Other
Revenue from External Customer [Line Items]
Sales	$ 206	$ 419

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+ References

No definition available.

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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